The correct option is D gymnosperms
Generally, a single embryo is present in the seed but sometimes more than one embryo may develop in a single seed. The development of more than one embryo in an ovule, seed or fertilized ovum (egg) is called polyembryony.
Cleavage polyembryony refers where the original zygote splits into many identical embryos. It is a general feature of gymnosperms. It can occur in angiosperms too but it is of rare occurrence.
Monocotyledons and dicotyledons, also known as monocots and dicots, respectively, are two types of angiosperm plants. Monocot plants have a single cotyledon, fibrous root system, and leaves of parallel venation. Dicots plants have a pair of cotyledons, taproot system, leaves are of reticulate or net venation.